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| Sunflowers blossom in Nantong, east China's Jiangsu, on October 21, 2023. (PHOTO: VCG) |
As an oil crop, sunflower is grown around the world, and its containers are a by-product that is often considered agro-industrial waste. Chinese scientists have found that compounds from sunflower crop waste can fight gray mold.
Botrytis cinerea, a common fungus, causes fruits and vegetables to rot, reducing their quality and shortening their shelf life.
Using methanol and ethyl acetate to prepare extracts from sunflower stems, researchers isolated four new compounds that could destroy the plasma membrane integrity of fungi and cause suspension of their biofilm formation ability, significantly preventing rotting in blueberries.
In another experiment, the researchers briefly wet blueberries with the stem extracts, then dried the fruits and injected them with mold spores (one of the structures that certain fungi can form). Over six days, the stem extracts protected almost half the berries from mold growth.
The finding suggests that sunflower extracts might be a bio-control agent for preventing post-harvest diseases in vegetables.